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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2023 Sep 20 1231 UTC

SIDC Předpověď

Sluneční erupce

M-class flares expected (probability >=50%)

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sluneční protony

Quiet

	10cm tok	Ap
20 Sep 2023	166	015
21 Sep 2023	168	018
22 Sep 2023	170	007

Slunečně aktivní oblasti a vzplanutí

There are ten active regions visible on the disk. The strongest flare of the last 24 hours was an M4.0 one from NOAA AR 3435, peaking at 20:14 UTC on 19 September. This region has developed into a beta-delta region, also NOAA ARs 3436 and 3438 have evolved in complexity (now beta-gamma magnetic field configuration). More M-class flares can be expected in the next 24 hours, X-class flares are possible but less likely.

Vyhazování koronální hmoty

No Earth directed CMEs were observed in the last 24 hours.

Koronální díra

There are two small negative coronal holes crossing the central meridian, one at the equator and one in the northern hemisphere.

Solární bouře

In the last 24 hours, the Earth has been inside the influence of ICME and high speed solar wind, with interplanetary magnetic field reaching 11 nT (Bz down to -7 nT) and solar wind speed descending from 620 km/’s to 520 km/s.A gradual decrease into slow solar wind is expected, until the probable arrival of the CME from 17 september in about 24 hours. More disturbed solar wind conditions can be expected if the ICME arrives (although chances of this happening are low).

Geomagnetismus

During the last 24 hours the geomagnetic conditions have reached minor storm levels globally (NOAA KP 5) and active levels locally (K_Bel 4), due to the ICME and high speed solar wind combination. The situation is expected to subside gradually, but more disturbed periods can be expected if the CME from 17 September arrives in about 24 hours.

Úrovně protonového toku

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next 24 hours.

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV electron flux went above the 1000 pfu threshold during brief instants between 15:00 UTC on 19 September until 01:00 UTC on 20 September, as measured by GOES 16. It may increase over the threshold again in the next 24 hours. The 24 hour electron fluence increased from normal to moderate level, it is expected to stay at that levels for the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 179, na základě 12 stanic.

Solární indexy za 19 Sep 2023

Wolfovo číslo Catania	189
10cm sluneční tok	166
AK Chambon La Forêt	038
AK Wingst	040
Odhadovaný Ap	040
Odhadovaný mezinárodní počet slunečních skvrn	164 - Na základě 21 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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